A read-only WirelessGauge64 giving the cumulative count of codewords received on this head-end channel since the link was last administratively brought up, current as of this operational second. Unlike the subscriber-side per-link counters, this is scoped to the shared channel at the head end, aggregating traffic that may come from multiple subscriber units on that same channel. For example, comparing p2mpHe1SecTotalCodewords against the sum of individual subscriber units' p2mpTotalCodewords on that channel would let an admin sanity-check that the channel-level aggregate matches the per-subscriber breakdown.